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Polyurethane/vinyl polymer IPN bi-component damping material

A vinyl polymer, damping material technology, applied in the field of polyurethane/vinyl polymer IPN two-component damping materials, damping materials, can solve the problems of heat resistance, oxidative resistance, hydrolysis stability, poor corrosion resistance, etc. The effect of simple construction, convenient storage and lower production cost

Inactive Publication Date: 2009-12-09
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Regarding polyurethane / vinyl polymer interpenetrating network polymer damping materials, most of the past focused on polyester polyurethane / vinyl polymer IPN damping materials and polyether polyurethane / vinyl polymer IPN damping materials. Although the effective damping temperature range of polymers is generally wide, their heat resistance, oxidation resistance, hydrolytic stability, and corrosion resistance are generally poor.

Method used

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  • Polyurethane/vinyl polymer IPN bi-component damping material
  • Polyurethane/vinyl polymer IPN bi-component damping material
  • Polyurethane/vinyl polymer IPN bi-component damping material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Synthesis of polyurethane prepolymer:

[0023] Add 50 grams of hydroxyl-terminated polybutadiene / acrylonitrile liquid rubber into a four-necked bottle equipped with a stirring blade, a thermometer, a dropping device, and an air guide tube, vacuumize at 75° C., and pretreat for 4 hours. Then the temperature was lowered to 60°C, and nitrogen was blown. Add 0.025 g of dibutyltin dilaurate catalyst and 5.9 g of toluene diisocyanate preheated to 60°C, stir for 5 minutes, raise the temperature to 75°C, control the temperature at 75±1°C, and react for 3 hours.

[0024] 2) Preparation of the first component (A):

[0025] Accurately weigh 40 grams of polyurethane prepolymer, 0.1971 grams of benzoyl peroxide, and 10 grams of ethyl acetate, and stir evenly to form component A.

[0026] 3) Preparation of the second component (B):

[0027] Accurately weigh 5 grams of ethyl acetate, 6.89 grams of butyl methacrylate, 6.89 grams of butyl acrylate, 0.725 grams of α-hydroxyethyl me...

Embodiment 2

[0032] 1) repeat 1) step in embodiment 1,

[0033] 2) Preparation of the first component (A):

[0034] Accurately weigh 40 grams of polyurethane prepolymer, 0.058 grams of benzoyl peroxide, and 10 grams of ethyl acetate, and stir evenly to form component A.

[0035] 3) Preparation of the second component (B):

[0036] Accurately weigh 5 grams of ethyl acetate, 6.89 grams of butyl methacrylate, 6.89 grams of butyl acrylate, 0.725 grams of α-hydroxyethyl methacrylate, 0.029 grams of N, N-dimethylaniline, 0.102 grams of Dibutyltin laurate, 0.1971g of 1,4-butanediol, 0.1957g of trimethylolpropane, stir evenly, that is component B.

[0037] 4) Preparation of polyurethane / vinyl polymer IPN two-component damping material:

[0038] Mix components A and B according to a weight ratio of 70:30 and a molar ratio of -NCO / -OH of 1.2, stir evenly, remove air bubbles, cast into a film, place at room temperature, and obtain a damping material after curing.

[0039] figure 2 It is the dyn...

Embodiment 3

[0041] 1) repeat 1) step in embodiment 1,

[0042] 2) Preparation of the first component (A):

[0043] Accurately weigh 40 grams of polyurethane prepolymer, 0.1018 grams of benzoyl peroxide, and 10 grams of ethyl acetate, and stir evenly to form component A.

[0044] 3) Preparation of the second component (B):

[0045]Accurately weigh 5 grams of ethyl acetate, 13.78 grams of butyl methacrylate, 0.725 grams of α-hydroxyethyl methacrylate, 0.0509 grams of N, N-dimethylaniline, 0.102 grams of dibutyltin dilaurate, 0.1971 gram of 1,4-butanediol, 0.1957 gram of trimethylolpropane, stir evenly, that is, component B.

[0046] 4) Preparation of polyurethane / vinyl polymer IPN two-component damping material:

[0047] Mix components A and B according to a weight ratio of 70:30 and a molar ratio of -NCO / -OH of 1.2, stir evenly, remove air bubbles, cast into a film, place at room temperature, and obtain a damping material after curing.

[0048] image 3 It is the dynamic mechanical pr...

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Abstract

Polyurethane / vinyl polymer IPN bi-component damping materials are provided, which belongs to the vibration-absorptive materials preparation field. The materials are prepared by the following steps: first, the HTPB / acrylonitrile liquid rubber and isocyanate synthesize the PUP, and then the oxidant and solvent are added to produce the A component; the vinyl monomer, reducer, catalyst, polyurethane chain entendor as well as cross linker and solvent are mixed evenly based on certain proportion to produce B component; finally the A component and B component are blended based on certain proportion to gain the damping materials, thus producing the damping materials with excellent thermal stability, hydrolytic stability, low temperature flexibility, corrosion resistance and oil resistance. The maximum of the dissipation factor reaches over 0.7 in the range between minus 100 DEG C. to 100 DEG C.. The preparation method of the materials has simple process, normal temperature cure and low production cost.

Description

Technical field: [0001] The invention belongs to the field of shock-absorbing material preparation, and relates to a damping material with wide temperature range and high damping performance, in particular to a polyurethane / vinyl polymer IPN (blended, copolymerized and interpenetrating polymer network) two-component damping material. Background technique: [0002] Regarding polyurethane / vinyl polymer interpenetrating network polymer damping materials, most of the past focused on polyester polyurethane / vinyl polymer IPN damping materials and polyether polyurethane / vinyl polymer IPN damping materials. Although the effective damping temperature range of polymers is generally wide, their heat resistance, oxidation resistance, hydrolytic stability, and corrosion resistance are generally poor. In recent years, active end-group liquid rubber (mostly hydroxyl-terminated polybutadiene liquid rubber) has been used as a soft segment of polyurethane as a damping material, Sonal Desai, I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/00C08G18/40C08G18/10C08G18/24C08G18/83
Inventor 李效玉袁海滨
Owner BEIJING UNIV OF CHEM TECH
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